[gpfsug-discuss] mount: /dev/gpfs01 already mounted or /gpfs01 busy

[Buterbaugh, Kevin L]

Hi Tejas,

One thing that I have had occasional success with is a lazy unmount - i.e. “unmount -l /gpfs01”.  Doesn’t help more of the time than it does help in my experience, but it’s one thing I try before bouncing a node.  HTHAL…

Kevin

On Jun 29, 2016, at 10:43 AM, Tejas Rao <raot at bnl.gov<mailto:raot at bnl.gov>> wrote:

Hi all,

I cannot get the filesystem mounted again on few nodes.

[root@ ~]# /usr/lpp/mmfs/bin/mmmount gpfs01
Wed Jun 29 11:29:50 EDT 2016: mmmount: Mounting file systems ...
mount: /dev/gpfs01 already mounted or /gpfs01 busy
mmmount: Command failed. Examine previous error messages to determine cause.



Things I have tried and checked.



1. Checked /proc/mounts and /etc/mtab and lsof /dev/gpfs01 and both /dev/gpfs01 and /gpfs01 are not seen anywhere.

2. Tried mmshutdown/mmstartup and it fails to unload mmfs modules. See below.

3. mmumount gpfs01 -f


A reboot of the client would probably fix it but as the client is used in production, this is not easy to do.


Are there any tricks/hacks to remount the filesystem again without rebooting the client.


[root@~]# /usr/lpp/mmfs/bin/mmshutdown
Wed Jun 29 11:10:52 EDT 2016: mmshutdown: Starting force unmount of GPFS file systems
Wed Jun 29 11:10:57 EDT 2016: mmshutdown: Shutting down GPFS daemons
Shutting down!
'shutdown' command about to kill process 11431
Unloading modules from /lib/modules/2.6.32-504.8.1.el6.x86_64/extra
mmfsenv: Module mmfslinux is still in use.
Unmount all GPFS file systems and issue the command:
 mmfsadm cleanup
Unloading module mmfs26
ERROR: Module mmfs26 is in use
mmfsenv: Error unloading module mmfs26.
Unloading module mmfslinux
ERROR: Module mmfslinux is in use by mmfs26
mmfsenv: Error unloading module mmfslinux.
Wed Jun 29 11:11:03 EDT 2016: mmshutdown: Finished
[root@~]#

Thanks.
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—
Kevin Buterbaugh - Senior System Administrator
Vanderbilt University - Advanced Computing Center for Research and Education
Kevin.Buterbaugh at vanderbilt.edu<mailto:Kevin.Buterbaugh at vanderbilt.edu> - (615)875-9633



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